<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>{{ title }}</title>
    {% block ext_css %}

    {% endblock %}
</head>
<body>
    {# 规划末班布局，第一次出现，规划布局 #}
    {% block header %}
    
    {% endblock %}

    {% block banner %}
    
    {% endblock %}

    {% block content %}
    
    {% endblock %}

    {% block footer %}
    
    {% endblock %}
</body>
</html>